GadgetUK
Ace Ghost Pilot
- Joined
- Sep 27, 2013
- Posts
- 1,323
Interesting! It's good that 123578 are working, I wonder if the wires for 4 and 6 are either not making a proper connection, or maybe on the CPLD the pins are making a bad connection. There's a chance the inputs are faulty I guess. It's worth posting some close ups of the board where the wires connect to - at the point they connect (top and bottom), and also the 2 CPLD chips on there if you can. I might be able to spot something? Note that it's probably not a good idea to feed 5v directly into that chip as although the IO pins are 5v tolerant I am not sure if it has to be programmed that way to support it, and normally that VCC pin from the cart is something like 4v - that said I doubt the 5v input has caused any problem because the IO pins are supposed to be 5v tolerant. Don't worry about the 5v vcc for now, You can change back to using the lower voltage later once you get it working. Whilst testing the 5v will probably be OK. Did you by chance get the cart which has Metal Slug X on it? The reason I ask, there's a chance they changed the pin ordering and connectivity between the cart and sub board. The diagram etc is based on the 138 in 1 that doesn't have Metal Slug X on it.
EDIT: If you do have the Metal Slug X version, there's a chance the binary values for some games are different.
EDIT: If you do have the Metal Slug X version, there's a chance the binary values for some games are different.
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